210030091 has 2 divisors, whose sum is σ = 210030092. Its totient is φ = 210030090.

The previous prime is 210030083. The next prime is 210030101. The reversal of 210030091 is 190030012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210030091 - 2³ = 210030083 is a prime.

It is a super-2 number, since 2×210030091² = 88225278250936562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210030011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105015045 + 105015046.

It is an arithmetic number, because the mean of its divisors is an integer number (105015046).

Almost surely, 2^210030091 is an apocalyptic number.

210030091 is a deficient number, since it is larger than the sum of its proper divisors (1).

210030091 is an equidigital number, since it uses as much as digits as its factorization.

210030091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 210030091 is about 14492.4149471370. The cubic root of 210030091 is about 594.4205841673.

The spelling of 210030091 in words is "two hundred ten million, thirty thousand, ninety-one".